springboot整合es

1.在创建spring项目时勾选es
2.修改es版本

 <elasticsearch.version>7.6.1</elasticsearch.version>

3.在config中连接es

package com.huang.config;

import org.apache.http.HttpHost;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class ElasticSearchClientConfig {
    
    
    @Bean
    public RestHighLevelClient restHighLevelClient(){
    
    
        RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder(
                        new HttpHost("localhost",9200,"http")
                )
        );
        return client;
    }
}

4.写pojo层

package com.huang.pojo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@AllArgsConstructor
@NoArgsConstructor
public class content {
    
    
    private String title;
    private String img;
    private String price;
}

5.书写逻辑层代码，实现放入和查询

package com.huang.service;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.serializer.SerializeFilter;
import com.huang.pojo.content;
import com.huang.utils.HtmlParseUtil;
import org.apache.lucene.util.QueryBuilder;
import org.elasticsearch.action.bulk.BulkRequest;
import org.elasticsearch.action.bulk.BulkResponse;
import org.elasticsearch.action.index.IndexRequest;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.text.Text;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.common.xcontent.XContentType;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.index.query.TermQueryBuilder;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightField;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.naming.directory.SearchResult;
import javax.swing.text.Highlighter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.TimeUnit;


@Service
public class contentService {
    
    

    @Autowired
    private RestHighLevelClient restHighLevelClient;



    //放入ElasticSearch
    public Boolean parseContent(String keywords) throws Exception{
    
    
        List<content> contents = new HtmlParseUtil().parseJD(keywords);
        BulkRequest bulkRequest = new BulkRequest();
        bulkRequest.timeout("2m");
        for (int i = 0; i < contents.size(); i++){
    
    
            bulkRequest.add(new IndexRequest("jd_goods")
                            .source(JSON.toJSONString(contents.get(i)), XContentType.JSON));
        }
        BulkResponse bulk = restHighLevelClient.bulk(bulkRequest, RequestOptions.DEFAULT);
        return bulk.hasFailures();
    }

    //搜索
    public List<Map<String, Object>> searchPage(String keyword, int pageNo, int pageSize) throws IOException {
    
    
        if(pageNo <= 1){
    
    
            pageNo = 1;
        }

        //条件搜索
        SearchRequest searchRequest = new SearchRequest("jd_goods");
        SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();

        //分页
        sourceBuilder.from(pageNo);
        sourceBuilder.size(pageSize);

        //精准匹配
        TermQueryBuilder termQueryBuilder = QueryBuilders.termQuery("title", keyword);
        sourceBuilder.query(termQueryBuilder);
        sourceBuilder.timeout(new TimeValue(60, TimeUnit.SECONDS));

        //执行搜索
        searchRequest.source(sourceBuilder);
        SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);

        //解析结果
        ArrayList<Map<String, Object>> list = new ArrayList<>();
        for (SearchHit documentFields:searchResponse.getHits().getHits()){
    
    
            list.add(documentFields.getSourceAsMap());
        }
        return list;
    }

    //搜索高亮
    public List<Map<String, Object>> searchPagehighlighter(String keyword, int pageNo, int pageSize) throws IOException {
    
    
        if(pageNo <= 1){
    
    
            pageNo = 1;
        }

        //条件搜索
        SearchRequest searchRequest = new SearchRequest("jd_goods");
        SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();

        //分页
        sourceBuilder.from(pageNo);
        sourceBuilder.size(pageSize);

        //精准匹配
        TermQueryBuilder termQueryBuilder = QueryBuilders.termQuery("title", keyword);
        sourceBuilder.query(termQueryBuilder);
        sourceBuilder.timeout(new TimeValue(60, TimeUnit.SECONDS));

        //高亮
        HighlightBuilder highlightBuilder = new HighlightBuilder();
        highlightBuilder.field("title");
        highlightBuilder.requireFieldMatch(false);
        highlightBuilder.preTags("<span style='color:red;'>");
        highlightBuilder.postTags("</span>");
        sourceBuilder.highlighter(highlightBuilder);

        //执行搜索
        searchRequest.source(sourceBuilder);
        SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);

        //解析结果
        ArrayList<Map<String, Object>> list = new ArrayList<>();
        for (SearchHit hit:searchResponse.getHits().getHits()){
    
    
            Map<String, HighlightField> highlightFields = hit.getHighlightFields();
            HighlightField title = highlightFields.get("title");
            Map<String, Object> sourceAsMap = hit.getSourceAsMap();
            if(title != null){
    
    
                Text[] fragments = title.fragments();
                String new_title = "";
                for(Text text : fragments){
    
    
                    new_title += text;
                }
                sourceAsMap.put("title", new_title);

            }
            list.add(sourceAsMap);

        }
        return list;
    }
}

6.在控制层中调用

package com.huang.controller;

import com.huang.service.contentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;

import java.io.IOException;
import java.util.List;
import java.util.Map;

@RestController
public class contentController {
    
    
    @Autowired
    private contentService contentService;

    @GetMapping("/parse/{keyword}")
    public Boolean parse(@PathVariable("keyword") String keywords) throws Exception {
    
    
        return contentService.parseContent(keywords);
    }

    @GetMapping("/search/{keyWord}/{pageNo}/{pageSize}")
    public List<Map<String, Object>> search(@PathVariable("keyWord") String keyWord,
                                            @PathVariable("pageNo") int pageNo,
                                            @PathVariable("pageSize") int pageSize) throws IOException {
    
    

    return  contentService.searchPagehighlighter(keyWord, pageNo, pageSize);

    }
}